centromere

sexual offspring recombination variation segment karyotype chiasma prophase ancestor heredity sequence unique exchange metaphase parents repair crossover diversity reconnect break pair material overlapping allele paternal telomere synapsis crossing sister tetrad female heterologous chromosome maternal genes chromosomes biological gender chromatids genetic code genetics sex nucleus chromatin anatomy scientific cell research reproduction homologous science genome evolution gene centromere human vector dna chromatid education medical mutation chromosomal division meiosis molecule biochemistry laboratory diagram structure medicine health biology protein